There are Chinese all over Africa--some have been there for years but others are recent arrivals. So far, no massive outbreaks have been recorded either among the resident Chinese or the natives.

It is summer so they are not deficient in vitamin D-3, the Sunshine vitamin.

Its summer south of the equator but not all of Africa is experiencing summer. Besides, in the tropics seasons are usually either wet or dry and not hot or cold.

And blacks have a tendency to Vitamin D deficiency because their skin does not absorb light as readily as white skin. England hadn't seen a case of rickets for nearly a century until Caribbean blacks began immigrating there.

The authors explain that “2019-nCov was reported to share the same receptor, Angiotensin-converting enzyme 2 (ACE2)” as the SARS disease, an outbreak of which in 2003 seemed almost exclusively to kill Northeast Asians.

'Rebuilding America's Defenses' and the Project for the New American Century | by Bette Stockbauer | antiwar.com | June 18, 2003 | Excerpts:

"Rebuilding America's Defenses (RAD)" is a policy document published by a neoconservative Washington think tank called the Project for the New American Century (PNAC).
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There is, indeed, much reason for alarm because PNAC is not an ordinary think tank and "RAD" is not an ordinary policy paper. Many PNAC members now hold key positions in the White House, Defense and State Departments, among them Dick Cheney, Donald Rumsfeld, Paul Wolfowitz, Richard Perle, Elliot Abrams, Lewis Libby, and John Bolton, along with others in lesser positions. William Kristol, writer for the conservative magazine, the Weekly Standard, is chairman of the group [Note: Refs. @ Twitter webcache and Wikipedia].
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Future Forms of Warfare, Including Biological
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Information systems will become an important focus of attack,
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And advanced forms of biological warfare that can target specific genotypes may transform biological warfare from the realm of terror to a politically useful tool" (p. 60).